I see that the majority upvoted to the "ES6" because ES6 is plain javascript that has more features to the typescript, such as classes, arrow functions and so on. I believe that ES6 is better for the API.

I'll go with Laravel, Why? Read it: Laravel is an open-source PHP web framework, dedicated for developing web apps, websites and eCommerce stores using MVC pattern. The features and functionalities with ease of use have made Laravel as the leading PHP framework of 2017. It offers several development elements such as authentication and unit testing support. Laravel PHP Framework enables developers to solve all these common problems fast, Like; Building an Authentication and Authorization Systems Integration with Mail Services Integration with Tools for Making Integration with Tools for Making Web Applications Faster Fixing the Most Common Technical Vulnerabilities Configuration Error and Exception Handling Automation Testing Work URL Routing Configuration Message Queue System (Delayed Delivery) Configuration The framework has opened new possibilities for the business web app development, and you can too avail its benefits by hiring a Laravel developer